Reamer.



PATENTED MAR. 26, 1907.

J. G. MATTHEWS.'

BEAMER.

APPLIOATION FILED DB0. 7, 1904.

..... -|ll1 m llgvczlyton,

MW M T Es 'remar ermee, y

-JoHN1GQMATTHEws,- or THREE RIVERS; MICHIGAN;

l Specification of LettersPatent.

'REA-amm .Application med Detente '1. i904. serai No. V235.878,

To all whom it may c oltcern.-- 1

l Beit known that I,vv JOHN G.' m'rrnnws', acitizen of theUnitedStates, residing'I at the city 'of Three RiversV county -ofSt.`J'ose'ph, State of -Michigan,` have invented vcertain new and useful .Improvements in Reame'rs, of which the followingis a specification,

Thisinvention relates to improvements in adjustable reamers. i Y 'lffhe4 objects of this-invention are, first, to

lprovide an virri-proved 'adjustable k !reamer "j Vwhich'may be readily adjusted to`slightly in'-,

creaseordiminish its diameter and to' conrpensate for wear; second,- to provide animproved adj ustablereamer utilizing .my in ventio'n for which I made application for Letters Patent, iledJune 22, 1.904, Serial No.

" are madeuse of and l structural details will definitely appear om 213,718,in which blades of highfspeed steel supported in a 'body of inferiormetal. J 4- 1 v`l'irther objects and objects relatin to -thedetailed description to follow. v `I accomplislllthe objects of my invention by the devices and means' described inthe through the body ofa reamer embodying my f anying drawin ,forming a vpartof this speci- The invention vis clearly defined,.and pointed outin the claims,l l A structure embodying thefeaturesof my invention isclearlyil ustrated in the accomcation, in whic f (Figure 1-1s a transverse sectlonalview im rovements, vtaken on aline correspondiii to ne 1 1 ofFig. 2.` Fig. v2 1s alongitudina sectional view taken on a line corresponding to line2 2 of Fi I, the shank A- and head- A v being shown in ll lines.

In the drawin the sectional views are taken looking int e direction of the little ar` rows at the ends ofthe-- secti'on-lines, and

similar letters. of reference referfto siinilar parts in both Views. l

' Referring to the drawing, A is the shank ofmy limproved adjustable 4reamer, which is provided with a tapered orconical head A', Screwfthreadsv are' cut-at,` `each end ofthe headA. rI he head- A"is.provided'with longitudinally-arranged key-seats a toreceive the. keys a, b r means of which the shell is selcured to the The Shen eis" preferably@ Sea steel and ltudinal split or kerf -eadto insure its rotation there- 'preferably made up of half-sections, eachisecf tion being suitably keyed-to the head1.. This shell is conformed. to lit the tapered or Patented March 26,19012 `conical; head,;S 0 thatas it vis moved fup and tomanufacture'.

The shell B isprovided with a"plurality^of internal 'longitudinal kerfs l), which artially sever the same 'at intervals.- These' erfs ex-V tend to substantiall the same distance from the outer surface o thesliell and forni substantially' a'thin jcylinder of metal with in- 'wardl -projecting parts.

ta e, )ecause when, the shell is expanded the' si( es open out evenly like a cylinder, as dis- 'tin uished from' the developmentofa cone,

an( the blades consequent y are not vdisarranged intheir 'arallel relation, but remain aralle-l with the onvitudinal axis of the tool.,

y this'particular develo ment 01"' the'shell the segments ofthe same ear evenlyon the .conica ed thereby,-a nd the end collars also bearcenter A and are effectively support- 'lhis is of advanevenly against thebeveled ends of the shell.'r l l This would n'e't be true if 'the kerfs were not' out to secure' this evene *lindrical shell 'of' metal. 'Ihis makes the s ell 4quite exible,l so thatitmay .be readily adjusted on the head to increasel or vdiminish itsdiarnetmf.

B'lade's B,ef self-hardeningro'r other l1 grade steel, are secured inpsition, preferamy in. tlie'manner described in my application -i for a patent` heretofore menti-oned. Other means for secuiingthe blades, however, will be foundkdesirable for -use vin this relation.

The blades B are preferably locate at points between the kerfsfb--andalternating successively'tlierewith.

By providing the kerfs'b the. shell singes. very flexible and atthe same time' the cutting blades arefsupp'orted b a substantiallyselid shell, yare provided. These nuts vadjusjt'ably: secure the shell -upon the head. LBy :stdju'stsv ing'tli'e nuts back and forth the she'll'is-car"-.v -riedfbaek and forth to varyits 4diameterfor v 'compensate for .wearlvThe linterr'ial kerfs, b. 'insure the evenexpansionof'theshellethatcial connection other than the friction of the parts will be required bet-Ween the head and shell.

While I have described my improved adjustable rearner as made up of a. shell of soitI soft metal, open at one side at` least, adjustmetal 'With high-speed steel blades secured therein, I Wish to remark that my invention is applicable to reaniers in which the shell necessarily of the saine gra-dc of steel as the blades and will not possess the 'same degree.

. of edju'stability as the structure i have illus` intervals, suitable cutting-blades; and means for adjustabl)r securing said shell upon said head, for the purpose specified.

2. In an adjustable reainer, the combination olE a tapered or conical head; a shell of able on said head, to expand or contractl to i dillerent sizes," and blades of high-grade steel inserted n I l and blades are made integral, although ol' course in such circumstances the shell is l inctal, open at one side at least;

into said shell, lor the purpose specified.

ln an adiustahlc reauier, a shell ol solltl blades ol' hiO'h-vrade steel carried b said soft,-

n n .l

metal shell; and an adiustable means for expanding' or contract me said shell, l'onthe pui'- Having thus described my' invention,v what i I claim as new, and desire to secure by liettei-'sPeisenL isv l 1. En an adiusteble reanier, the combinapose specified.

ln witness whereof l. have hereunto sel;- my hand and seal in presence oll two witnesses. JOHN G. MA "NUC YS. Ii.. s] Witnesses 1 J. W. Stimm, li. C'. lunas-iu.

cutting- 

